My system requires two cables that have a 3.5mm plug on one end leading to dual 1/4-inch plugs on the opposite end. One is to connect my laptop’s line out (headset) port to the 1/4-inch stereo inputs on the Behringer Sound Mixer. The other is to connect the stereo 1/4-inch output ports to a 3.5mm port on a speaker. This cable was inexpensive and sounds great!